Triangle Angle Sum & Exterior Angle Theorems FLASHCARD

Front

What is the Triangle Angle Sum Theorem?

Back

The Triangle Angle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Front

If one angle of a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

What is the measure of the third angle in a triangle if the other two angles are 34° and 46°?

Back

The third angle measures 100° (180° - 34° - 46°).

Front

What is an exterior angle of a triangle?

Back

An exterior angle is formed by one side of the triangle and the extension of an adjacent side.

Front

According to the Exterior Angle Theorem, how do you find the measure of an exterior angle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two non-adjacent interior angles.

Front

If one angle of a triangle is 62° and another is 36°, what is the measure of the third angle?

Back

The third angle measures 82° (180° - 62° - 36°).

Front

What is the relationship between the angles in a triangle?

Back

The angles in a triangle are related such that their sum is always 180 degrees.

Front

If the exterior angle of a triangle is 121°, what are the measures of the two non-adjacent interior angles?

Back

The sum of the two non-adjacent interior angles is 121°.

Front

What is the measure of an angle if it is complementary to 50°?

Back

The angle measures 40° (90° - 50°).

Front

What is the measure of an angle if it is supplementary to 34°?

Back

The angle measures 146° (180° - 34°).